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From: Abel Vesa <abel.vesa@linaro.org>
Date: Wed, 14 Feb 2024 23:13:46 +0200
Subject: [PATCH RFC v3 1/4] dt-bindings: spmi: Add PMIC ARB v7 schema
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Message-Id: <20240214-spmi-multi-master-support-v3-1-0bae0ef04faf@linaro.org>
References: <20240214-spmi-multi-master-support-v3-0-0bae0ef04faf@linaro.org>
In-Reply-To: <20240214-spmi-multi-master-support-v3-0-0bae0ef04faf@linaro.org>
To: Stephen Boyd <sboyd@kernel.org>, 
 Matthias Brugger <matthias.bgg@gmail.com>, 
 Bjorn Andersson <andersson@kernel.org>, 
 Konrad Dybcio <konrad.dybcio@linaro.org>, 
 Dmitry Baryshkov <dmitry.baryshkov@linaro.org>, 
 Neil Armstrong <neil.armstrong@linaro.org>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Cc: Srini Kandagatla <srinivas.kandagatla@linaro.org>, 
 Johan Hovold <johan@kernel.org>, linux-kernel@vger.kernel.org, 
 linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, 
 linux-mediatek@lists.infradead.org, Abel Vesa <abel.vesa@linaro.org>

Add dedicated schema for PMIC ARB v7 as it allows multiple
buses by declaring them as child nodes. These child nodes
will follow the generic spmi bus bindings.

Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
---
 .../bindings/spmi/qcom,spmi-pmic-arb-v7.yaml       | 119 +++++++++++++++++++++
 1 file changed, 119 insertions(+)

diff --git a/Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb-v7.yaml b/Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb-v7.yaml
new file mode 100644
index 000000000000..8a93d2145aa5
--- /dev/null
+++ b/Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb-v7.yaml
@@ -0,0 +1,119 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spmi/qcom,spmi-pmic-arb-v7.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm SPMI Controller v7 (PMIC Arbiter)
+
+maintainers:
+  - Stephen Boyd <sboyd@kernel.org>
+
+description: |
+  The SPMI PMIC Arbiter v7 is found on Snapdragon chipsets. It is an SPMI
+  controller with wrapping arbitration logic to allow for multiple on-chip
+  devices to control up to 2 SPMI separate buses.
+
+  The PMIC Arbiter can also act as an interrupt controller, providing interrupts
+  to slave devices.
+
+properties:
+  compatible:
+    const: qcom,spmi-pmic-arb-v7
+
+  reg:
+    items:
+      - description: core registers
+      - description: tx-channel per virtual slave regosters
+      - description: rx-channel (called observer) per virtual slave registers
+
+  reg-names:
+    items:
+      - const: core
+      - const: chnls
+      - const: obsrvr
+
+  ranges: true
+
+  '#address-cells':
+    const: 2
+
+  '#size-cells':
+    const: 2
+
+  qcom,ee:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 5
+    description: >
+      indicates the active Execution Environment identifier
+
+  qcom,channel:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 5
+    description: >
+      which of the PMIC Arb provided channels to use for accesses
+
+patternProperties:
+  "spmi@[0-1]$":
+    type: object
+    $ref: /schemas/spmi/spmi.yaml
+
+required:
+  - compatible
+  - reg-names
+  - qcom,ee
+  - qcom,channel
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    spmi: arbiter@c400000 {
+      compatible = "qcom,spmi-pmic-arb-v7";
+      reg = <0x0c400000 0x3000>,
+            <0x0c500000 0x4000000>,
+            <0x0c440000 0x80000>;
+      reg-names = "core", "chnls", "obsrvr";
+
+      qcom,ee = <0>;
+      qcom,channel = <0>;
+
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      spmi_bus0: spmi@0 {
+        reg = <0 0x0c42d000 0 0x4000>,
+              <0 0x0c4c0000 0 0x10000>;
+        reg-names = "cnfg", "intr";
+
+        interrupt-names = "periph_irq";
+        interrupts-extended = <&pdc 1 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-controller;
+        #interrupt-cells = <4>;
+
+        qcom,bus-id = <0>;
+
+        #address-cells = <2>;
+        #size-cells = <0>;
+      };
+
+      spmi_bus1: spmi@1 {
+        reg = <0 0x0c432000 0 0x4000>,
+              <0 0x0c4d0000 0 0x10000>;
+        reg-names = "cnfg", "intr";
+
+        interrupt-names = "periph_irq";
+        interrupts-extended = <&pdc 3 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-controller;
+        #interrupt-cells = <4>;
+
+        qcom,bus-id = <1>;
+
+        #address-cells = <2>;
+        #size-cells = <0>;
+      };
+    };

-- 
2.34.1